Snow in Mattapan, Massachusetts Winter storm alerts · 7-day snow forecast · average snowfall
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Mattapan averages 49.2 inches of snow a year. The snowiest month is February (14.4″), and snow usually falls from October through April. On about 11 days a year at least an inch falls, and about 1 day brings 10 inches or more.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
September
0″
0
—
1
52°F
October
0.2″
<1
—
9
41°F
November
0.7″
<1
—
18
34°F
December
9.0″
2
—
25
26°F
January
14.3″
4
—
28
21°F
February
14.4″
3
—
25
22°F
March
9.0″
2
—
22
30°F
April
1.6″
<1
—
10
39°F
May
0″
0
—
2
48°F
Year
49.2″
11
—
139
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Boston Logan Intl. Airport (7 mi from the city center, -62 ft elevation difference); temperatures at Norwood Mem Airport. Averages smooth out big years: single winters can bring half or double the normal.
49.2 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Boston Logan Intl. Airport station, 7 miles away). The snowiest month is February with 14.4 inches.
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How many freezing nights does Mattapan have?
About 139 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 21 °F.